An Electron Enters a Region of Uniform Perpendicular Fields

question 33

Multiple Choice

An electron enters a region of uniform perpendicular fields. It is observed that the velocity of the electron is unaffected. A possible explanation is:

• A) is parallel to and has magnitude E/B
• B) is parallel to
• C) is perpendicular to both and has magnitude B/E
• D) is perpendicular to both and has magnitude E/B
• E) the given situation is impossible

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